BBK throttle bodies

[Falco]

Howdy,

My stock TB is leaking badly at the shaft's ends, so I wanna replace it. One question thought. Since BBK stopped the production of the SyTy type TB's (Summit has the twin 58mm on the web, but they can't tell you a shipping date), I've to go with the 89-92 L98 TB. I know about the difference in the linkeage (sp?), so I've to change the linkeage between the stock and BBK unit. However I can't see how coluld I remove the stock one... I guess the one on the BBK is secured with a screw...

Anybody who has done this?

TIA,

 

[TURBO TY]

find another stocker and port it. dont waste the money on a bbk.

 

[Falco]

find another stocker and port it. dont waste the money on a bbk.

Actually the stock unit from GM is more expensive than the BBK unit. $372 (list price) compared to the $270 for the BBK at Summit now. And I don't want to start with a used unit, which probably has the same problem as my current one...

So anybody, who has done the conversion between the to different linkeage?

Thanks,

 

[Lynn D. Brown]

Falco,

Conley in Houston got me a BBK. I'm trying to get it running now. However 2 things R different :

1.) The linkage is different - I think just the Cruise, the other 2 seem to bolt up. Altho I'm not sure how well even the other two would function. I've asked Chris to get me a used 350 TB, which is the same as the SyTy TB, and I will change the linkage. U can call or EM Jerry McCoy about changing the linkage. I think he said U unbolt the throttle plate 1st. If there's rivets, U will have to drill them out.

2.) The TPS is different both in the mechanical and electrical hookups. So, U have to get the LT-1 TPS and then John Spina of Caspers' has a conversion electrical connector to go from the 2 diff connectors. I think, or certainly hope, that they put out the same 5V range signal.

I guess there R some advantages to the 1000 CFM BBK, altho probably not essential unless U R going "whole hog". It will move more air and has a much smoother inlet design. But the stocker is a pretty good piece, and if I had it to do over again, I would stay w it.

 

[Falco]

Lynn,

Thanks for your reply. What's the part number of your BBK TB? As far as I know the 89-92 L98 should be the same sensor wise as ours (part numbers are #1537 for the 52mm and #1539 for the 58 ). The LT1 is using a different sensor too...

Later,

 

[Lynn D. Brown]

Falco,

I don't have the part # since Conley bought it 4 me. but he should have it. Call Chris Conley at 281-540-3278, or EM him at conley@wt.net. I suspect that it is a later model. The guy that ordered it no longer works 4 Lawrence Conley.

 

[Windedv6]

I went a different route....I got a Lingenfelter 58mm TB and just switched the whole lower stock assembly TBS unit over to it. Works great . It's also looks as if Holley's will fit fine too... although I have not tried it....it looks as if the linkage is placed where ours is. In both cases the one for a 1992 350 tune port for a Camaro should work. Thats what mine came off of.

John

 

[FLSY2730]

If your going to buy a throttle body, 58mm for that matter, go with the arizonna speed and marine one, very nice unit.

 

[Falco]

Thanks guys. Yep, I heard about the arizona S&M, but it's a bit pricey for $479...

Later,

 

[stariy]

Check eBay, there are bunch of TBs listed.

 

[Falco]

Finally I ordered BBK #1551, which is the 58mm SyTy specific unit. Summit took the order, we will see wheter they can daliver it or not...

Later,